Cisco Webex Calling

Voice over IP Provider Node

This chapter provides a comprehensive guide to the Voice over IP Provider node used in this configuration example. It contains the following and assisted configuration steps:

A brief overview of the key topics covered:

1. VoIP Provider/PSTN Preset: We explore the setup process for connecting with VoIP providers or Public Switched Telephone Network (PSTN) services. This includes configuring the necessary parameters and settings to establish communication with external networks.

2. Network Controller: We discuss the role of the Network Controller and its configuration. This component ensures smooth communication between the VoIP Provider node and the network infrastructure, managing connectivity and routing.

3. Ports: We examine the configuration of ports within the VoIP Provider node, including the setup of port numbers and protocols for inbound and outbound communication.

4. NAT Traversal: We examine the NAT Traversal dialog, which can be important for SIP communication between VoIP devices behind Network Address Translation (NAT).

5. SIP Interconnection: We show the SIP Interconnection dialog, which allows determining one of the two common options: Node Interconnection via SIP Trunking and Node as SIP Registration Client.

6. Remote SIP Domain: We discuss the setup of remote SIP domains, enabling communication with external SIP domains outside the local network.

7. Client Authentication: We explore the configuration of client authentication mechanisms to ensure secure access and prevent unauthorized use of the VoIP Provider node.

8. Proxy: We show the Proxy assistant dialog, which may act as an intermediary for SIP signaling, e.g., for load balancing or failover scenarios.

9. Asserted-URI: We discuss the configuration of Asserted-URI, which specifies the identity of the calling or a called party, ensuring accurate routing and identification.

10. Network Peer Whitelist: We examine the configuration of network peer whitelists, allowing for the definition of trusted IP addresses or ranges for secure communication.

11. Incoming Rewrite Rules: We explore the setup of rewrite rules for incoming calls, enabling customization and rewriting of call attributes, such as dial strings or caller ID's.

12. Outgoing Rewrite Rules: We explore the setup of rewrite rules for outgoing calls, enabling customization and rewriting of call attributes, such as dial strings or caller ID's.

13. Node Name: We cover the configuration of the node name, which serves as a unique identifier for the VoIP Provider node within the network.

14. Node Overview: The provided node configurations will be reviewed in the final assistant dialog.